Parallel guiding structure for templets on machine tools



May 24, 1966 E. A. MATTHIAS PARALLEL GUIDING STRUCTURE FOR TEMPLETS ONMACHINE TOOLS Filed Aug. 26, 1964 Fig. I

5 Sheets-Sheet l 39 l I0 I! 12 I3 6 i 5 L -16 x I 27 I4 '17 l /5* l8 g220 I :3 V -2/ 1 r 40 I 0 -23 i 3 o. F 25 3] 9 25 INVENTOR A a 0e 4Ma/ff/as BY 2 i May 24, 1966 E. A. MATTHIAS 3,252,363

PARALLEL GUIDING STRUCTURE FOR TEMPLETS ON MACHINE TOOLS Filed Aug. 26,1964 5 Sheets-Sheet 2 May 24, 1966 E. A. MATTHIAS 3,252,363

PARALLEL GUIDING STRUCTURE FOR TEMPLETS ON MACHINE TOOLS Filed Aug. 26,1964- 5 Sheets-Sheet 5 Fig.3

INVENTOR A-"ye n /7- /Va//} z'ar United States Patent 3,252,363 PARALLELGUIDING STRUCTURE FOR TEMPLETS 0N MACHINE TOOLS Eugen A. Matthias,Schatl'hausen, Switzerland, assignor to Gieorg FischerAktiengesellschaft, Schaifhausen, Switzer an Filed Aug. 26, 1964, Ser.No. 392,153 Claims priority, application Switzerland, Sept. 26, 1963,

11,889/ 63 Claims. (CI. 82-14) The present invention relates to a devicefor parallelly guiding a templet holder on a chip-removing machine toolwith copying device, in which the templet holder is arranged on lateralsupporting members of a support which is tiltably journalled foradjusting the copy templet.

A tilting device for a copy templet has become known according to whichthe templets are arranged in a support which is tiltable about pivotsmounted on the machine. The said support carries adjusting means foradjusting the templet to the desired work piece diameter. If, with suchan arrangement, for purposes of adjusting the tool, large adjustingstrokes, i.e. adjusting angles are necessary, the angle of inclinationof the templet contour to be scanned changes with regard to the contactsurface of the feeler, which may result in copying errors.

In extreme instances, the deviation brought about by the requiredcorrection may be so great that the control edge of the copy templetwill be located outside the contact range of the feeler.

It is, therefore, an object of the present invention to provide a devicefor parallelly guiding a templet holder on chip-removing machine toolswith copying device, which will overcome the above-mentioned drawbacks.1

It is another object of this invention to provide a device as set forthin the preceding paragraph, in which the copy templet may be adjusted toa relatively large extent without the necessity of changing the angularposition of said copy templet.

It is a further object of this invention to provide a tiltable templetholder which may be adjusted to two or more positions.

These and other objects and advantages of the invention will appear moreclearly from the following specification in connection with theaccompanying drawings, inwhich:

FIGURE 1 diagrammatically illustrates an elevation partly in sectionthrough a copy lathe equipped with a copy templet holder according tothe present invention;

FIGURE 2 is a perspective view of a portion of the arrangement of FIGURE1 and, more specifically, the upper right-hand portion of FIGURE 1;

FIGURE 3 is a diagrammatic illustration partially in section of anotherembodiment of the present invention provided with a tiltable templetholder.

The device according to the present-invention is characterized primarilyin that the parallel guiding arrangement comprises two pivot points onelements of the machine, on which pivot points two arms are tiltablyjournalled. These arms have one of their ends provided with a movablepivot while the same movable pivots are interconnected by a further armwhich, in its turn and more specifically at one end thereof, carries arigidly arranged templet holder. The invention is furthermorecharacterized in that one of the arms journalled on pivots of themachine is rigidly connected with a support carrying a fixed pivotassociated with a respective arm, the said support representing anadjusting lever which is adapted to be affected by an adjusting screw.

Referring now to the drawing in detail, the copying lathe illustratedtherein with a hydraulic copying device as, for instance, described inU.S. Patent No. 2,645,084,

has mounted therein a workpiece 2 rotatable on a Work means 39. Thearrangement according to the invention furthermore comprises a base 8 towhich is connected the machine bed 7 and two lateral walls 9 (only oneof said lateral walls being visible in FIG. 1viz. the righthand one).Also visible from the drawing are parts of a hydraulic copying controlincluding a copy templet holder 21 having connected thereto a copytemplet 23, a feeler lever 25 rotatably journalled on pivot 26 on copycarriage 5, said feeler lever 25 carrying a feeler 24. When copyturning, said feeler 24 slides along copy templet 23. A control membersuch as a valve 29 which is displaceable relative to a stationarycontrol edge 28 4 of the copy turning device is, through a rod 30 and aconnection 31, connected to the feeler lever 25. The arrangement alsocomprises a pressure spring 27 acting upon control member 29. The copycarriage 5 moves along guide means 39.

The templet holder 21 is by means of pivots 20 rotatably suspended ontwo arms 22 (one only being visible). Said two arms 22 form a part of asupport 18 which is turnable about a pivot 19 on said side walls 9.Templet holder 21 is rigidly connected to a lever arm 17 which in itsturn, by means of a pivot 13, is pivotally connected to an arm 12rotatably journalled on a pivot 11 in a U-shaped support 10. U-shapedsupport 10 is rigidly connected to side wall 9 and comprises anadjusting screw 16 and a pressure spring 14, which are adapted to actupon an adjusting lever arm 15 rigidly connected to support 18. FIG. 2shows in perspective, the location of the various elements describedabove in connection with FIG. 1.

Operation of the embodiment of FIGS, 1 and 2 In the parallelogram-likefour-joint train which serves for parallelly guiding the templet holder21 and consists primarily of elements 12 and 17 and arm 22, each two 7of the respective oppositely located members of the four-joint trainhave the same length. Since the two joint pivots 11 and 19, which arelocated above each other, are anchored to the side plate 9, the firstmember of the four-joint train is formed by the side plate 9 itself,whereas arm 22 rigidly connected to support 18 represents a furthermember. the pivot 11 and in view of the pivot 13 connection willcontinuously during tilting movements of support 18 hold member 17parallel to the connecting line of pivots 11 and 19. As a resultthereof, the copy templet 23 may be adjusted to any customary extentwithout a change in its angular position. This adjustment is effected bymeans of adjusting screw 16 acting upon adjusting lever arm 15 which isunder the effect of a pressure spring 14, and also through theintervention of support 18.

Embodiment of FIG. 3

The embodiment of FIG. 3 represents a further development of the deviceillustrated in FIGS. 1 and 2. The pivot 11 of FIG. 1 has its equivalentin the pivot 11a of FIG. 3 but in contrast to the arrangement of FIGS.

Member 12 turns about 3 of FIG. 1 has been replaced by a titable templetholder 38 having connected thereto two copy templets 23a and 23b.Adjusting screw 16 and pressure spring 14 which act upon adjusting leverarm 15 which is rigidly connected to support 18 and arm 22 are held intwo arms 36 and 37 on side plate 9. The adjusting device pro vides fortwo predetermined axially shifted positions of rod 33.

The function of this device consists in that templet holder 38 is guidedparallelly not only in the manner described in connnection with FIGS. 1and 2 but its tiltable adjustment is effected by a suitable displacementof the pivot 11a by means of said four-joint train. In the positionillustrated in the drawing, copy templet 23a can be scanned by the copysystem. Copy templet 23b is in tended for a second machining operation.To this end, the adjusting device 35, which is adapted to be actuatedmechanically, hydraulically, pneumatically or electrically,

displaces pivot 11a to position 11b whereby the pivot 13a moves toposition 13b. As a result thereof, tiltable templet holder 38 is soadjusted that the copy templet 2312 may be scanned by feeler 24. It willbe obvious for geometrical reasons that this tiltable adjustment willfunction also when arm 22 and thereby link 12 are not horizontal. Whendisplacing the pivot 11a to position 11b, link 12 does not move in itslongitudinal direction but parallel to itself.

It is, of course, to be understood that the present invention is, by nomeans, limited to the particular construction shown in the drawing butalso comprises any modifications within the scope of the appendedclaims.

What is claimed is:

1. In a templet controlled machine tool having a base and a copy slidemoveable on the base and templet operated means controlling the movementof the slide and a copy slide moveable on the base and templet tocontrol said templet operated means, a parallelogram linkage on saidbase comprising pivotally interconnected arms, said templet holder beingfixed to one of said arms, and means for adjusting the angularity ofsaid arms relative to each other.

2. In a templet controlled machine tool having a base and a copy slidemoveable on the base and templet operated means controlling the movementof the slide on the base; a templet holder for receiving a templet tocontrol said templet operated means, a linkage comprising pairs ofparallel pivotally interconnected arms forming parallelogram means, oneof said arms comprising a portion of said base whereby a second of saidarms opposite thereto takes a motion parallel to a fixed referenceplane, said templet holder being fixed to said second. arm and beingadapted to support a templet having its effective-contour in a planeparallel to said fixed plane, and means for adjusting said arms topredetermined positions of angularity relative to each other.

3. In a templet controlled machine tool having a base and a copy slidemoveable on the base and templet operated means controlling the movementof the slide on the base; a templet holder for receiving a templet tocontrol said templet operated means, spaced first pivot means on saidbase, parallel first arm means pivoted at one end to respective ones ofsaid first pivot means, second pivot means in the other end of saidfirst arm means and disposed on a line parallel to a line passingthrough said first pivot means, second arm means connected to saidsecond pivot means, said templet holder being connected to said secondarm means, and means between said base and one of said first arm meansfor adjusting said one of said first arm means angnlarly thereby toeffect movement of said templet holder in parallelism with itself in anare about one of said first pivot means.

4. In a templet controlled machine tool having a base and a copy slidemoveable on the base and templet operated means controlling the movementof the slide on the base; a templete holder for receiving a templet tocontrol said templet operated means, spaced first pivot means on saidbase, parallel first arm means pivoted at one end to respective Ones ofsaid first pivot means, second pivot means in the other end of saidfirst arm means and disposed on a line parallel to a line passingthrough said first pivot means, second arm means connected to saidsecond pivot means, said templet holder being connected to said secondarm means, a lever fixed to one of said first arm means, a screw on thebase abutting said lever so that adjustment of the screw will adjustsaid one of said first arm means angularly thereby to effect movement ofsaid templet holder in parallelism with itself in an are about one ofsaid first pivot means.

5. In a templet controlled machine tool according to claim 4- in whichsaid screw forms an abutment for said lever when the linkage moves tomove the templet holder in a direction toward the contoured edge of atemplet therein, and a spring bearing on the lever and biasing it towardsaid screw.

6. In a templet controlled machine tool according to claim 3 in whichsaid templet holder is adapted to receive a templet having a contouredcontrol edge formed in a plane parallel to the said lines passingthrough said first and second pivot means.

7. In a templet controlled machine tool having a base and a copy slidemoveable on the base and templet operated means controlling the movementof the slide on the base; a templet holder for receiving a templet tocontrol said templet operated means, spaced first pivot means on saidbase, parallel first arm means pivoted at one end to respective ones ofsaid first pivot means, second 'pivotmeans in the other end of saidfirst arm means and disposed on a line parallel to a line passingthrough said first pivot means, second arm means connected to saidsecond pivot means, said templet holder being connected to said secondarm means, and means between said base and one of said first arm meansfor adjusting said one of said first arm means angularly thereby toeffect movement of said templet holder in parallelism with itself in anare about one of said first pivot means, said templet holder havingmeans for supporting at least two templets in parallel spaced relation,and means for tilting said templet holder to present the control edgesof respective ones of said templets to a templet follower.

8. In a templet controlled machine tool having a base and a copy slidemoveable on the base and templet operated means controlling the movementof the slide on the base; a templet holder for receiving a templet tocontrol said templet operated means, spaced first pivot means on said'base, parallel first arm means pivoted at one end to respective ones ofsaid first pivot means, second pivot means in the other end of saidfirst arm means and disposed on a line parallel to a line passingthrough said first pivot means, second arm means connected to saidsecond pivot means, said templet holder being connected to said secondarm means, and means between said base and one of said first arm meansfor adjusting said one of said first arm means angularly thereby toeifect movement of said templet holder in parallelism with itself in anare about one of said first pivot means, said templet holder havingmeans for supporting at least two templets in parallel spaced relation,and means for adjusting one of said first arm means in the direction ofits'length thereby to 'tilt said second arm means to tilt said templetholder to present the control edges of respective ones of said templetsto a templet follower.

9, In a templet controlled machine tool having a base and a copy slidemoveable on the base and templet operated means controlling the movementof the slide on the base; an elongated first :bar forming a templetholder,

an elongated second bar in spaced parallel relation to said first barand pivoted to said base, first arms fixed to said second bar andextending to and pivoted to said first bar, second arms fixed to saidfirst bar and extending therefrom at an angle to said first arms, thirdpivoted to said second arms at points remote from said first bar andextending parallel to said first arms, means pivotally connecting saidthird arms to said base, the pivotal connections of said second bar andthird arms with said base lying in a plane parallel with a planecontaining the pivots pertaining to said second arms, a lever fixed tosaid second bar, a spring between the base and lever urging the lever inone direction, and means screw threadedly connected to the base andforming an adjustable abutment for said lever.

10. In a templet controlled machine tool according to claim 9 in whichsaid means pivotally connecting said third arms to said base includesmeans for adjusting the pivotal connection of said third arms to saidbase to cause tilting of said second arms and first bar withoutchangingthe condition of parallelism of said first and' third arms.

No references cited.

WILLIAM W. DYER, IR., Primary Examiner.

G. A. DOST, Assistant Examiner.

1. IN A TEMPLET CONTROLLED MACHINE TOOL HAVING A BASE AND A COPY SLIDEMOVEABLE ON THE BASE AND TEMPLET OPERATED MEANS CONTROLLING THE MOVEMENTOF THE SLIDE AND A COPY SLIDE MOVEABLE ON THE BASE AND TEMPLET TOCONTROL SAID TEMPLET OPERATED MEANS, A PARALLELOGRAM LINKAGE ON SAIDBASE COMPRISING PIVOTALLY INTERCONNECTED ARMS,